I am Salvatore from Sicily Italy, a student in mathematics that uses
Mathematica 9 and engaged, at the time, in the study of Primes .
I have a problem with the function of Mathematica Regular Expression (
REGEX ).
MY PROBLEM.. : Given a string of characters 0 and / or 1 of indefinite length (10, 100, 1000, 1000000 .........., characters), which is the source code REGULAR EXPRESSION ( Regex ) of MATHEMATICA for searching a substring of n characters (20 ....) with jumps, steps, of equal length (20 ....) of the sub-string?